SVCET VNR, III Internal Test - ME2302/Dynamics - Question Paper for 05th Semester Mechanical Engineering [Set 01]

Sri Vidya College of Engineering and Technology

Sivakasi Main Road, Virudhunagar – 626 005

Department of Mechanical Engineering

III Internal Test

Semester & Branch	05 / Mechanical Engineering	Date	30/10/14 AN
Subject Name	Dynamics of Machinery	Max. Marks	50
Subject Code	ME2302	Max. Time	90 min

Part A  (5 x 2 =10)

1	Write the equation for relation between height and speed of a Porter governor
2	What do you mean by sensitivity of a Governor
3	Write some applications of Gyroscope
4	Define the radius of rotation of a Governor
5	What is gyroscopic principle

Part B  [(1 x 8) + (2 x 16) = 80 marks]

6 (a)	Derive the relation between height and speed of a Proell governor		(08)
	Or
6 (b)	Derive the relation between height and speed of a Hartnell governor		(08)
7 (a)	Each wheel of a motorcycle is of 600 mm diameter and has a moment of inertia of 1.2 kg-m3. The total mass of the motorcycle and the rider is 180 kg and the combined centre of mass is 580 mm above the ground level when the motor cycle is upright. The moment of inertia of the rotating parts of the engine is 0.2 kg-m2. The engine speed is 5 times the speed of the wheels and is in the same sense. Determine the angle of heel necessary when the motorcycle takes a turn of35 m radius at a speed of 54 km/h.		(16)
	Or
7 (b)		The turbine rotor of a sea vessel having a mass of 950 kg rotates at 1200 rpm clockwise while looking from the stern. The vessel pitches with an angular velocity of 1.2 rad/s. What will be the gyroscopic couple transmitted to the hull when the bow rises? The radius of gyration of rotor is300 mm		(16)
8 (a)		In a Hartnell governor, the radius of rotation of the balls is 60 mm at the minimum speed of 240 rpm. The length of the ball arm is 130 mm and of the sleeve arm 80 mm. The mass of each ball is 3 kg and of the sleeve 4 kg. The stiffness of the spring is 20 N/mm. Determine, (i) the speed when the sleeve is lifted by 50 mm, (ii) the initial compression of the spring, (iii) the governor effort, (iv) the power		(16)
		Or
8 (b)		Each arm of a Porter governor is 400 mm long. The upper arms are pivoted on the axis of the sleeve and the lower arms are attached to the sleeve at a distance of 40 mm form the axis. Each ball has a mass of 6 kg and the weight on the sleeve is 50 kg. Find the range of speed of the governor if the extreme radii of rotation of the balls are 260 mm and 300 mm.		(16)

Share This